Warm Peanut Butter and Jelly Bread Pudding

The taste on this was fantastic - peanut butter and jelly plus a glass of warm, vanilla-scented milk, all at once.

But the pudding didn't come out right for me, I think because "half a loaf of challah" isn't a very clear measurement. I definitely should have added bread; I got something loose, more like pudding than bread. I also suspect I should have chosen a more rustic loaf of bread; the dense, soft loaf I used pretty much disintegrated at serving.